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y <br /> J <br /> • Temperature and pH concentrations in the monitoring well waters is typical of V groundwater <br /> encountered in the Lodi area (Environmental Forensics Inc, 2002) <br /> 3;2 Groundwater Analytical Results <br /> Groundwater analytical results indicate maximum concentrations of petroleum hydrocarbons and <br /> related gasoline fuel constituents present in PT- MW-3 for this quarter monitoring event as <br /> follow <br /> Constituent Concentration Well <br /> benzene 400 p g/L PT-MW-3 <br /> toluene 1,100 p g/L PT-MW-3 <br /> ethylbenzene 340 pg/L PT-MW-3 <br /> xylene 2,000 pg/L PT-MW-3 <br /> TPH Gasoline 21,000 p g/L PT-MW-3 <br /> MTBE 8 2 pg/L PT-MW-3 <br /> M ND <br /> ET ND <br /> TBA ND <br /> DIPE ND <br /> TAME ND <br /> 1,2-DCA 18 pg/L PT-MW-3 <br /> 1,2-EDB 3 9 pg/L PT-MW-3 <br /> 3_3 Local Groundwater Flow Direction and Gradient <br /> The groundwater surface undulates slightly but has a gentle slope toward S80W with a gradient <br /> of 000125 (Figure 4) This flow direction and gradient are consistent with published <br /> groundwater data from the City of Lodi (Environmental Forensic Investigations, Inc , 2002) and <br /> San Joaquin County Department of Public Works (1999) groundwater surface elevations for the <br /> North San Joaquin Water Conservation District <br /> 334 Petroleum Hydrocarbon Groundwater Plume <br /> The areal or horizontal extent of the petroleum hydrocarbon groundwater plume at the site <br /> extended throughout the site Isoconcentration maps of TPH-gasoline and benzene in the <br /> groundwater are presented as Figures 6 and 7 Minor concentrations of 1,2 DCA and MTBE <br /> above RWQCB maximum contaminant levels (MCL's) were reported in monitoring well PT- <br /> MW3 <br /> Maln\D\lRnvironmental\ParmarTexaco\Reports\041403QMR wpd 5 <br />